'use strict';

function even_to_letter(collection) {
    var arr=[];
    for(let item of collection){
      if(item%2==0){
        arr.push(String.fromCharCode(item%26+96));
      }
    }
    console.log(arr);
return arr;  //在这里写入代码
}

module.exports = even_to_letter;
